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Rare exoplanet 37 EP

K2-316 b

RA 233.6247° · Dec -23.2595° · exoplanet

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Score breakdown

· 5 badges
37 pts · Rare
Rare 50 pts → Epic
  • Tidally locked +10
  • Super-Earth +8
  • Orbits a red dwarf +8
  • Multi-planet system +6
  • Confirmed exoplanet +5
Total score 37

13 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Super-Earth · +8
  • Tidally locked · +10
  • Multi-planet system · +6
  • Orbits a red dwarf · +8

Trivia

What it actually is

  • Hugging its star. It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.
  • What it is made of. Its density says rock, though lighter than Earth's mix: probably less iron, or a thick shell of water and ice over the top.
  • Crowded system. One of at least 2 planets orbiting its star.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 17.1 it is far too faint for the eye: this one belongs to cameras and long exposures.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around May — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Properties

density gcc
5.44
diameter km
16965.746
discovery facility
K2
discovery method
Transit
discovery year
2020
dist ly
366.8798
eq temp k
841
host star teff
3436
inclination
87.02
insolation
68.5057
mag
17.14
mass earth
2.33
name
K2-316 b
orbital period days
1.133
radius earth
1.33
semi major au
0.0147
sys num planets
2
sys num stars
1
tidally locked
yes
tidally locked inferred
yes

About K2-316 b

K2-316 b is a rare exoplanet. It lies about 366.9 light-years from Earth, shines at apparent magnitude 17.14, has an equilibrium temperature near 841 K and spans roughly 1.33 Earth radii.

It orbits closer to its star than Mercury does to the Sun, completing a lap in less time than Mercury takes.

How to see it

At apparent magnitude 17.14, it takes a larger telescope or a long-exposure image to capture.

Like any astronomical target, K2-316 b is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why K2-316 b is a rare exoplanet

K2-316 b scores 37 points on Spacedle's rarity scale, which places it in the rare tier. Another 13 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Super-Earth, Tidally locked, Multi-planet system and Orbits a red dwarf — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.